Li-Ni Metal Oxides Processed with Rapid Atmospheric-Pressure-Plasma Jet for Flexible Gel-Electrolyte Li-Ion Hybrid Supercapacitors
Chia-Ling Wu,
I-Chih Ni,
Chih-I Wu,
I-Chun Cheng,
Chien-Fu Chen,
Jian-Zhang Chen
Affiliations
Chia-Ling Wu
Graduate Institute of Applied Mechanics, National Taiwan University , Taipei City 10617, Taiwan; Advanced Research Center for Green Materials Science and Technology, National Taiwan University , Taipei City 10617, Taiwan
I-Chih Ni
Graduate Institute of Photonics and Optoelectronics, National Taiwan University , Taipei City 10617, Taiwan
Chih-I Wu
Graduate Institute of Photonics and Optoelectronics, National Taiwan University , Taipei City 10617, Taiwan; Department of Electrical Engineering, National Taiwan University , Taipei City 10617, Taiwan; Graduate School of Advanced Technology, National Taiwan University , Taipei City 10617, Taiwan
I-Chun Cheng
Graduate Institute of Photonics and Optoelectronics, National Taiwan University , Taipei City 10617, Taiwan; Department of Electrical Engineering, National Taiwan University , Taipei City 10617, Taiwan; Innovative Photonics Advanced Research Center (i-PARC), National Taiwan University , Taipei City 10617, Taiwan
Chien-Fu Chen
Graduate Institute of Applied Mechanics, National Taiwan University , Taipei City 10617, Taiwan; Graduate School of Advanced Technology, National Taiwan University , Taipei City 10617, Taiwan
Graduate Institute of Applied Mechanics, National Taiwan University , Taipei City 10617, Taiwan; Advanced Research Center for Green Materials Science and Technology, National Taiwan University , Taipei City 10617, Taiwan; Graduate School of Advanced Technology, National Taiwan University , Taipei City 10617, Taiwan; Innovative Photonics Advanced Research Center (i-PARC), National Taiwan University , Taipei City 10617, Taiwan
We use screen printing to deposit LiCl + Ni(NO _3 ) _2 ·6H _2 O pastes on a flexible carbon cloth substrate and then calcine it using a nitrogen atmospheric-pressure-plasma jet (APPJ). Through the high-temperature treatment by APPJ, pastes can be rapidly converted into Li-Ni oxides (LNOs). The LNOs on carbon cloth are then used as the electrodes of flexible gel-electrolyte Li-ion hybrid supercapacitors (Li-ion HSCs). The best areal capacity of 21.076 mC cm ^−2 , as measured by cyclic voltammetry, is achieved by APPJ treatment at 620 °C for 480 s. To demonstrate the flexibility of the Li-ion HSCs, the Li-ion HSCs were bent at different curvatures to measure its performance. After bending test, the capacity remains >93% under bending with a curvature of up to 2 cm ^−1 .
